Centering or form for reenforced concrete structures



Jan. 8 1924..

C. A. P.

' CENTERING 0R FORM FORREENFORCED CONCRETE STRUCTURES TURNER Filed June1 1920 2 Sheets-Sheet 1 @HQQJ c.1484 wg) Jan. 8 1924.

C. A. P. TURNER CENTERING OR FORM FOR REENFORCED CONCRETE STRUCTURESFiled June 1, 1920 2 Sheets-Siieet 3 nve'v'y tot u 1 N\ J \m .\m, wN Raw Tm M wm Mm.

Patented Jan. 8, i92

Liana CLAUDE A. r. TURNER, or MINNEAPOLIS,- MINNESOTA, .assrenon 'ro T.w nennnn, or

COLUMBUS, onro.

CENTEEIHG 0R FOB-M FOR BEEN Application filed. June 1,

To all whom it may concern:

Be it. known that I, CLAUDE A. P. TURNER, a citizen of the UnitedStates, residing at lwlinneapolis, in the county of llcnnepin and Stateof Minnesota, hare invented certain new and useful lmprovements inCentering or Forms for lteenforced Concrete Structures, of whichthefollowing is a specification, reference being had therein to theaccompanying drawing.

The main object of my invention is to orovide an inexpensive, easilyhandled metaltype centering for the slab, column and beam (when beamsare used) m n'i'bers of reenilorced concrete structures and one whichwill assure rapid removal or elimination of excess water intl'ieeonorete, and withthe known benefitof quick elimination of water onthe consolidation and strength of the concrete. My invention therefore,consists in the centering having the characteristics substantially ashereinafter set forth and defined by or included within the scope of theappendedv claims.

1 illustrate, and shall describe my invention as embodied in centeringfor beam and slab construction, but without intending to restrict myinvention thereby beyond the scope of my claims.

In the drawings: I

Fig. 1 is atop plan view of such centering, parts being broken away tobetter illustrate the construction;

Fig. 2 is a vertical section on the line 2 2 of Fig. 1

Fig. 3 is a vertical. section on line 3-3 ct Fig. 2;

Fig. t is a detail plan view showing the joist construction.

Described in a general way, my invention, in the case shown in thedrawings, coinprises post or uprights, oists attached there to, floorsupporting stringers on the joists, all of these members being made ofchannels and detachably and adjustably connected together, and eachmember made of sections or units detachably and adjustably asscirbled; acomposite flooring made of sheet metal members, one of corrugated ironor steel that rests on the stringers and the other of fiat or planesheets of iron or steel that rest on the. corrugated men'ibers, each ofsaid members being composed of sections or unit that are alike for eachmember, and are detachably and adjustably united or joined;

roracnn cononnmn sraucrunn's;

1920. Serial No. 25,571.

horizontal troughs that constitute the beam forms, and made of sheetmet-alparts that are detachably and adjustably connected or assembledand column. forms with side walls of sheet metal parts and detachablyand adjustably connected or assembled. By reason, of the detachable andadjustable characteristics of the various members or elements of theorganization, the same centering can be repeatedly used for differentjobs, and for jobs whose dimensions vary vertically and two wayshorizontally.

All the form members with which the concrete. has contact are providedwith numerous holes or perforations through which excess water in theconcrete passes and is thereby quickly eliminated, thus facilitatingtherapid consolidationof'the concrete and assuring the desired density andstrength thereof.- Tests have shown that the presence or absence ofthese drainage holes means a difference in the strength of the setconcrete of from one-third to one hal'f.

Proceeding now with a description in detail, of what is shown in the.drawings, the

posts or uprights 1O consist of" sections or" units olf angles that lappast one another and are detachably and adjustably joined, as by meansof headed pins 11 that pass through registering holes 12 in, theoverlapping webs, these pins being secured by a key or cotter 13, sothat they can easily and quickly be secured or released. At the bottom,the posts rest on double wedges 1 4 which afford an efiicient andquickly applied and removed means for such close vertical adjustment ofthe post as may be necessary.

At the upper ends of the posts that are in the same straight line, aredetachably secured, by the headed pin} and cotter device 15, the joistslfi, formed each of channel sections or units that are lapped anddetachably and adjustably connected as by the headed pin and cotterdevice, and upon the joists 16 are laid the stringers 17, also ofchannel sections or units, detachably and adjustably connected.

Laid upon the stringers are obl0ng,.c0rrugs-ted thin gage sheets 18 ofstandard size, that lap at sides and ends so that they form a supportcoextensive with each panel area, for the flat floor oblong sheets 19 ofthin gage metal that are laid thereon, overlapping at sides and ends toform a smooth,

the panel span.

flat, continuous expanse to receive and support the concrete for thefloor or roor" slab, the overlapping portions being united to preventdisplacement by the simple expedient oi dropping short Wire nails 19through aliningholes 20, the sheet being provided throughout its extent,With such holes for the drainage of Water. Similar holes 21 for the samepurpose are provided in the corrugated sheets to drain the latter. Thecorruga-ted sheets by reason of their corrugations, furnish a strong andrigid support for the floor plates, and thus the composite iioor memberhas the admirable qualities of stillness, or rigidity, and strength,smoothness or flatness, and lightness, as Well as ability to eliminateexcess Water in an ei' cient and altogether satisfactory Way Withoutloss of cement. Where the corrugated sheets lap endWise, they too may befastened together by nails dropped through alining holes 21. Where theylap at the sides, the corrugations of one interlock with those of theother and thus form an adequate union of them.

The beam forms are composed of tWo similar side Walls 22, each With anoutturned flange28 at the top to lap the adjacent tloor plates 2&- andU-shaped bottom section Whose vertical side Walls overlap and aredetachably connected With the side Walls 22 as by stove bolts 26, theoverlap being sufficient to adequately vary the height of the beam. Saidside and bottom Walls are made of sections Or units, lengthwise, to

change the length of the beam form to suit To make beams of vary ingWidth, a collection of lJ-shaped sections of assorted Widths isprovided. The side and bottom Walls of the beam form have drainage holes27.

To adequately support the bottom and. sides of the beam form, I join inpairs posts 10 that are on opposite sides 01' the "form and engage suchsides by a horizontal section or unit 28 of channel iron, the latter andthe posts being adjustably' and detachably connecti-xd as by the headedpin and cotter device 29 and alining holes in the parts, and. so thatsaid unit 28 bears against the bottom of the form.

The column form consists of four similar vertical Walls of sheet metal,each Wall 30 being L-shaped in cross section, the four being grouped sothat the flange, or angle or one overlaps that of another, and the extent of overlap being determined by the diameter of the column to becast. The four Walls are supported externally, as by encircling straps,placed at proper intervals vertically, each strap being composed 01 twolike Ms formed each of angle bars 31 that are joined as by a hinge pin32 at the corner, and the bars of one l. being lapped across the bars oithe other and joined de tachably and adjustably by the headed pin andcotter device 33, and selected alining holes of a series of holes 34Lformed in each bar.

The column form side Walls are cut away to provide a hole at the topWhich registers with the beam form so that the concrete can join beamand column, and column form sides and beam iorm sides are detachablyconnected Where they adjoin as by the double angle plate 36.

The drainage holes in all the centering parts With Which the Wetconcrete has contact, are of such size and so uniformly distributed, andare at such intervals apart as generally throughout the entire centeringto effect the rapid and uniform elimination of the excess Water.

I claim l. Centering for concrete comprising a floor having an undercorrugated member and an upper flat plate member resting on thecorrugations of the under member, such upper member being provided WithWater drainage holes.

2. Centering for concrete comprising a floor having an under corrugatedmember and an upper fiat plate member resting on the corrugations of theunder member, each of such members being composed of separable units ofsheet metal, and a support 'ing system for said floor member, comprisingposts and connected horizontal members composed of adjustable anddetachable units formed of overlapping structural shapes, the adjustableand detachable connection being a headed pin and cotter device and holesin the overlapping portions 01" such shapes.

In testimony whereof I hereunto afiix my signature.

CLAUDE A. P. TURNER.

